AI agents call list_payment_methods to retrieve information from Keycrm without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
This tool retrieves a list of payment methods—a read-only operation with no side effects. It does not create, modify, delete, or execute operations. The data returned is configuration/reference information about available payment methods, not sensitive transaction data. The blast radius of misuse is minimal; an AI agent cannot cause harm by viewing this list.
From the tool's definition Tool name 'list_payment_methods' and description 'List all available payment methods with their IDs and names' indicate a retrieval operation that queries and returns data without modifying it.
Attacks that exploit this kind of access
List all available payment methods with their IDs and names. It is categorised as a Read tool in the Keycrm MCP Server, which means it retrieves data without modifying state.
Register the Keycrm MCP server in PolicyLayer and add a rule for list_payment_methods: allow, deny, rate-limit, or require approval. Point your MCP client at the PolicyLayer proxy URL and the rule is enforced on every call, before it reaches Keycrm. Nothing to install.
list_payment_methods is a Read tool with low risk. Read-only tools are generally safe to allow by default.
Yes. Add a rate_limit block to the list_payment_methods rule in your PolicyLayer policy. For example, setting max: 10 and window: 60 limits the tool to 10 calls per minute. Rate limits are tracked per agent session and reset automatically.
Set action: deny in the PolicyLayer policy for list_payment_methods. The AI agent will receive a policy violation error and cannot call the tool. You can also include a reason field to explain why the tool is blocked.
list_payment_methods is provided by the Keycrm MCP server (ivanklymenko/keycrm-mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
Every MCP server has a record like this.
Type a name, get the same breakdown: verified identity, auth posture, risk grade, capabilities, recommended policy.
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